10 Best Portable Greenhouse Heaters 2026 in the United States

The Dr Infrared Heater DR-268 is a solid choice for those seeking a portable greenhouse heater. With its heating capacity of up to 1500W, it effectively warms areas of 150-200 square feet, making it suitable for greenhouses, garages, and sheds. One of its standout features is the built-in digital thermostat, which allows for precise temperature control, ensuring that your plants stay at the right temperature without wasting energy. User-friendly features like the digital display and selectable Auto or Manual modes also make operation straightforward, even for those who aren't tech-savvy.

Safety is a priority with this heater, as it includes features like overheat protection and is designed to be water-resistant (rated IPX5), allowing it to be used both indoors and outdoors without worrying about damage from moisture. Its construction from dual layers of aluminum helps retain heat effectively, making it especially useful in colder environments.

There are some considerations to keep in mind. The heater requires assembly and, while it has multiple mounting options, it may not be as easy to reposition once installed. Additionally, while it’s energy efficient, being electric means it will add to your electricity bill, especially with continuous use. Lastly, with a one-year limited warranty and USA-based customer support, users can feel secure about their purchase. This heater is particularly suited for gardeners and growers looking for a reliable, versatile heating solution that can easily adapt to different spaces and conditions.

The BioGreen Electric Greenhouse Heater & Fan (PALMA) is a solid choice for small to medium greenhouses up to about 120 square feet. It offers flexible heating power with two settings (750W and 1500W), giving you control over energy use and warmth. Its digital thermostat is a handy feature that automatically maintains your chosen temperature between 32°F and 185°F, making it easy to keep plants comfy without constant adjustment. The built-in fan mode helps circulate air evenly, preventing hot spots and protecting plants from overheating.

It’s splash-proof (IPX4), so it can handle humid greenhouse conditions or occasional water splashes without worry. With a compact, portable design and a tabletop mount, you can easily move it around where needed. It runs on standard 120V electric power, which is common and convenient but means you need access to an outlet. While it’s energy efficient for its size and includes overheat protection for safety, its coverage suits smaller spaces best—larger greenhouses will need multiple units or a more powerful heater.

This dependable and user-friendly heater is ideal if you want precise temperature control in a compact electric heater designed specifically for greenhouse use.

The VIVOSUN AeroFlux Smart Grow Tent Heater is designed specifically for indoor gardening spaces like grow tents and greenhouses. Its 700W PTC heating element delivers strong and even warmth, heating up small to medium grow areas quickly and efficiently. The heater stands out with its smart temperature and VPD (Vapor Pressure Deficit) sensor, which automatically adjusts heat to create an ideal environment for plant growth without needing constant manual adjustments. You can control it easily via local buttons or an app, including setting different temperatures for day and night.

Safety is well covered with flame-retardant materials, overheat shutoff, and tip-over protection, helping prevent accidents in tight spaces. Its compact size and portability make it easy to fit in various setups without taking much room, and it runs on electricity, which is typical and convenient for indoor use. The maximum temperature setting is limited to 30°C, which should be enough for most plants but may not satisfy those needing higher heat. Some users might find the app controls a bit advanced if they prefer simpler devices.

Weighing about 7 pounds, it remains manageable for moving around. This heater serves as a solid choice for hobbyist growers or small-scale greenhouses seeking precise climate control with energy efficiency and safety in mind.